Battery drain issue

I decided to go ahead and order a replacement. I had to order the replacement alt. It came in today but is not the same as the one on my car. The new (reman) alt has only one space for field but my original one has two. There are two wires (blue and green) that hook to those spades. It is the round back alt. The cases look identical other than this. The guy at AZ asked if I had one spade or two and I said two. Anyone had a similar issue?

Take it back and order one for a 73 Dart or Duster.:D
You want the square back with two terminals for field.
Just so you know, most all replacement alternators come with a 2 groove pulley now.
If your current alt is a one groove you can swap them, but it doesn't matter to the way it works.